Re: folding refused, set filetype=c helps, why?

> > So I wonder what 'set foldtype=c' internally does to reenable folding.

> Internally, setting filetype=c will re-apply the syntax highlighting,
> which will re-calculate all the folds.

Thank You for the information.

> You can try using zx, zX, or :syn sync fromstart to see if those have
> any effect.

I was not aware of the first two and I will try. Regarding :syn sync
fromstart -- This does not always help and that is the point here. In
some situations only the above mentioned command (:set filetype=c)
helps.

> The first two will have the additional effect of closing
> any manually opened folds, the third will make syntax highlighting
> slower.

What do you mean by "make ... slower"? You mean permanently?
Unfortunatelly I need to launch this third command quite often since
the syntax folding gets confused too easily.

> Do existing folds stay as they were, and just a new fold refuses to
> show up, or are all folds removed?

In the addressed situtation ALL folds refuse to fold. And, I think,
all folds are open in that case (not 100% sure).

Felix

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